Signal light to indicate the usage of a telephone in the home



FIG. 1 is a perspective view of a signal light to indicate the usage ofa telephone in the home showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a left elevational view thereof.

The ornamental design for a signal light to indicate the usage of a telephone in the home, as shown in FIGS. 1 through
 6. 